Science

CBSE class 8 Science syllabus, question papers, online tests and important questions as per CBSE syllabus. Notes, test papers and school exam question papers with solutions. Main topics are Crop Production and Management, Microorganisms : Friend And Foe, Synthetic Fibres and Plastics, Materials : Metals and Non-Metals, Coal and Petroleum, Combustion and Flame, Conservation of Plants and Animals, Cell — Structure and Functions, Reproduction in Animals, Reaching the Age of Adolescence, Force and Pressure, Friction, Sound, Chemical Effects of Electric Current, Some Natural Phenomena, Light, Stars and the Solar System, Pollution of Air and Water.

1.Food

Crop production
Crop production: How are different food crops produced? What are the various foods we get from animal sources?

Micro-organisms
What living organisms do we see under a microscope in a drop of water? What helps make curd? How does food go bad? How do we preserve food?

2. Materials

Materials in daily life Are some of our clothes synthetic? How are they made? Where do the raw materials come from?
Do we use other materials that are synthetic?
Do we use cloth (fabric) for purposes other than making clothes to wear? What kind of fabric do we see around us? What are they used for?

Different kinds of materials and their reactions.
Can a wire be drawn out of wood? Do copper or aluminium also rust like iron? What is the black material inside a pencil? Why are electrical wires made of aluminium or copper?

How things change/react with one another What happens to the wax when a candle is burnt? Is it possible to get this wax back?
What happens to kerosene/natural gas when it is burnt? Which fuel is the best? Why?

3. The World of the Living

Why conserve
What are reserve forests/ sanctuaries etc? How do we keep track of our plants and animals? How do we know that some species are in danger of disappearing? What would happen if you continuously cut trees?

The cell
What is the internal structure of a plant – what will we see if we look under the microscope? Which cells from our bodies can be easily seen? Are all cells similar?

How babies are formed How do babies develop inside the mother? Why does our body change when we reach our teens? How is the sex of the child determined? Who looks after the babies in your homes? Do all animals give birth to young ones?

4. Moving things, People and Ideas

Idea of force
What happens when we push or pull anything? How can we change the speed, direction of a moving object? How can we shape the shape of an object?

Friction
What makes a ball rolling on the ground slow down?

Pressure Why are needles made pointed? Why does a balloon burst if too much air is blown into it? Why does an inverted glass/ bottle/pitcher resist being pushed down into water? How can air/liquids exert pressure?

Sound
How do we communicate through sound? How is sound produced? What characterizes different sounds?

5. How Things Work Electric current and circuits
Why do we get a shock when we touch an electric appliance with wet hands?
What happens to a conducting solution when electric current flows through it?
How can we coat an object with a layer of metal?

6. Natural Phenomena Rain, thunder and lightning
What is lightning? What safety measures should we take against lightning strikes?

Light
What are the differences between the images formed on a new utensil and an old one?
Why is there this difference?
When you see your image in the mirror it appears as if the left is on the right – why?
Why don’t we see images on all surfaces around us? What makes things visible?
How do we see images of our back in a mirror?
Why do we sometimes see colours on oil films on water?
What is inside our eye that enables us to see?
Why are some people unable to see?

Night sky
What do we see in the sky at night? How can we identify stars and planets?

Earthquakes
What happens during an earthquake? What can we do to minimise its effects?

7. Natural Resources Man’s intervention in phenomena of nature What do we do with wood?
What if we had no wood?
What will happen it we go on cutting trees/grass without limit?
What do we do with coal and petroleum? Can we create coal and petroleum artificially?
What do we do with coal and petroleum? Can we create coal and petroleum artificially?

Pollution of air and water
What are the various activities by human beings that make air impure? Does clear, transparent water indicate purity?